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Article

An MRI-Based Patient-Specific Computational Framework for the Calculation of Range of Motion of Total Hip Replacements

1
Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, Doberaner Str. 142, 18057 Rostock, Germany
2
Aesculap AG Research and Development, 78532 Tuttlingen, Germany
3
Department of Orthopedic Surgery, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Frank Seehaus and Bastian Welke
Appl. Sci. 2021, 11(6), 2852; https://doi.org/10.3390/app11062852
Received: 24 February 2021 / Revised: 17 March 2021 / Accepted: 18 March 2021 / Published: 23 March 2021
The calculation of range of motion (ROM) is a key factor during preoperative planning of total hip replacements (THR), to reduce the risk of impingement and dislocation of the artificial hip joint. To support the preoperative assessment of THR, a magnetic resonance imaging (MRI)-based computational framework was generated; this enabled the estimation of patient-specific ROM and type of impingement (bone-to-bone, implant-to-bone, and implant-to-implant) postoperatively, using a three-dimensional computer-aided design (CAD) to visualize typical clinical joint movements. Hence, patient-specific CAD models from 19 patients were generated from MRI scans and a conventional total hip system (Bicontact® hip stem and Plasmacup® SC acetabular cup with a ceramic-on-ceramic bearing) was implanted virtually. As a verification of the framework, the ROM was compared between preoperatively planned and the postoperatively reconstructed situations; this was derived based on postoperative radiographs (n = 6 patients) during different clinically relevant movements. The data analysis revealed there was no significant difference between preoperatively planned and postoperatively reconstructed ROM (∆ROM) of maximum flexion (∆ROM = 0°, p = 0.854) and internal rotation (∆ROM = 1.8°, p = 0.917). Contrarily, minor differences were observed for the ROM during maximum external rotation (∆ROM = 9°, p = 0.046). Impingement, of all three types, was in good agreement with the preoperatively planned and postoperatively reconstructed scenarios during all movements. The calculated ROM reached physiological levels during flexion and internal rotation movement; however, it exceeded physiological levels during external rotation. Patients, where implant-to-implant impingement was detected, reached higher ROMs than patients with bone-to-bone impingement. The proposed framework provides the capability to predict postoperative ROM of THRs. View Full-Text
Keywords: joint replacement; hip joint; range of motion; impingement joint replacement; hip joint; range of motion; impingement
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MDPI and ACS Style

Kebbach, M.; Schulze, C.; Meyenburg, C.; Kluess, D.; Sungu, M.; Hartmann, A.; Günther, K.-P.; Bader, R. An MRI-Based Patient-Specific Computational Framework for the Calculation of Range of Motion of Total Hip Replacements. Appl. Sci. 2021, 11, 2852. https://doi.org/10.3390/app11062852

AMA Style

Kebbach M, Schulze C, Meyenburg C, Kluess D, Sungu M, Hartmann A, Günther K-P, Bader R. An MRI-Based Patient-Specific Computational Framework for the Calculation of Range of Motion of Total Hip Replacements. Applied Sciences. 2021; 11(6):2852. https://doi.org/10.3390/app11062852

Chicago/Turabian Style

Kebbach, Maeruan, Christian Schulze, Christian Meyenburg, Daniel Kluess, Mevluet Sungu, Albrecht Hartmann, Klaus-Peter Günther, and Rainer Bader. 2021. "An MRI-Based Patient-Specific Computational Framework for the Calculation of Range of Motion of Total Hip Replacements" Applied Sciences 11, no. 6: 2852. https://doi.org/10.3390/app11062852

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